need help im on an assingment and im confused also please dont lie about the answer

An organism which produces its food by photosynthesis:

must be placed in the Plantae Kingdom
may be placed in the Plantae Kingdom
must be placed in the Animalia Kingdom
may be placed the in the Animalia Kingdom

Respuesta :

must be placed in the plantae kingdom

only plants use photosynthesis

Answer:

may be placed in the plantae kingdom

Explanation:

it's not C or D because animals don'r produce photosynthesis. And some plants don't. So it has to be B.